/*
 * Copyright 2009 Jamie Gennis
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.code.gwt.remoteaction.client;

import com.google.gwt.user.client.rpc.AsyncCallback;

/**
 * A base class for action proxies.
 *
 * @author jgennis
 */
public class AbstractActionProxy implements ActionProxy {

  ActionExecutor actionExecutor;

  public AbstractActionProxy() {
  }

  public AbstractActionProxy(ActionExecutor actionExecutor) {
    this.actionExecutor = actionExecutor;
  }

  public ActionExecutor getActionExecutor() {
    return actionExecutor;
  }

  public void setActionExecutor(ActionExecutor actionExecutor) {
    if (actionExecutor == null)
      throw new IllegalArgumentException("The 'actionExecutor' argument may not be null");
    this.actionExecutor = actionExecutor;
  }

  /**
   * Proxy the execution of a single action to the current action executor.
   *
   * @param action the action to proxy
   * @param callback the action execution result callback
   */
  protected void proxyExecution(Action action, AsyncCallback<ActionResult> callback) {
    if (actionExecutor == null)
      throw new NoActionExecutorSpecifiedException();
    actionExecutor.execute(action, callback);
  }
}
